MX-UNRESOLVABLE
An MX host does not resolve
What it means
Senders cannot connect to a host without an address; they try the next MX or bounce after retries.
How to fix it
- 1Fix or remove the MX entry; MX targets need A or AAAA records.
Re-check after the change
DNS changes can take up to the record's TTL to be seen; use Re-run on the result page to bypass our 10-minute cache.